Oscillating pulsator



Dec. 20, 1932. 5 APQSTOLQFF I 1,891,493

OSCILLATING PULSATOR Filed Sept. 2. 1951 INVENTOR Sergias ApostoZo/f BYhi9 ATTORW Patented fies. 20, 1932 PATENT OFFICE SERGIITS APOSTOLOFF, OFNEW YORK, N. Y.

OSCILLATING PULSATOB Application filed September 2, 19311 The inventionrelates to improvements in oscillating pulsators, and more particularlyto pulsators used for closing and opening an electric circuitsuccessively.

Among'the principal objects which the invention has in view are: Toprovide an oscillating pulsator adapted for use in a multiplicity ofplaces; to provide an oscillating pulsator which is responsive to slightoscilla- 20 results as may be brought out in the following description(In the drawing:

The figure represents an oscillating pulsator in accordance with thepresent invention shown associated with a light circuit and dry cells.

As one exemplification of the invention, there may be provided aninsulatory sleeve open at both ends and at any varied shape, forinstance cylindrical as shown. This sleeve 10 receives a cap 11 at oneend thereof, and a cap 12 at the other end, said caps having endportions 13 and 14 respectively which .close the end of the sleeve whenassembled thereonand. also each provide side portions 15 and 16respectively, which telescope with respect to the sleeve preferably onthe outside thereof and in frictional engagement therewith so as toretain the caps normally assembled upon the sleeve. The inner edges ofthe telescopic portions 15, 16 of the two caps are separated from eachother so as not to enable a fiow of current to pass directly from onecap to the other. There is accordingly an inter- 45 vening portion ofthe insulator sleeve 10 which provides an electrical gap between the cas.

lane of the caps, here shown as 12,. carries a pulsator 17 preferably inthe nature of a spring pendulum. To this end, the pulsator and form aprotruding contact 19 for intro- Serlal No. 560,861.

17 is preferably a straight piece of flat spring material with one endthereof secured to the end portion 14 of the cap 12. As here shown, thepulsator 17 is normally axially disposed with respect to the sleeve andextends from the end portion 14 of the cap 12 to a position close to theend portion 13 of the other cap 11, at which end a suitable weight ormass 18 is attached to the pendulum so as to utilize the momentum of themass to oscillate the pulsator 17 back and forth for a considerableperiod of time when the oscillation has once been started. The attachedend of the pulsator may preferably extend through the cap duction of anelectric current to the pulsator.

Attached to the pulsator 17 as part thereof is a spring switch or arm 20having the outer end thereof spaced from the pulsator 17 andsubstantially parallel thereto. A screw or other contact 21 may bethreaded through the outer cap 11 and passed through the insulatingsleeve 10 into proximity to the said outer end of the arm 20. Byutilizing a screw or other adjustable means, the inner 'end thereof maybe brought to any desired distance from the spring arm and will thereforgovern the response of the device to slight oscillations if so desiredor only to greater oscillations if not desired to detect the slightvibrations. The pulsating pendulum 17 is shown in full lines in itsnormal position. When the device is subjected to a jolt, the pulsatingpendulum 17 then swings back and forth for a period as indicated in thedotted lines, and in so doing, the arm 20 comes into contact with screw21 in one position and moves away from such contact as shown in lowerdotted position. By virtue of the resiliency of the arm 20, a contact ismaintained for a definite period dependent upon the amount of movementof the pendulum toward the said screw 21. This varied length of contactmay be utilized in practice to gauge the severity of the jolt or otherinstigating vibration. I

As one means of rendering the oscillation visible, I havediagrammatically shown an electric lamp 22 having a filament 23, one endof which is connected by a wire 24 or other means to the outer cap 11carrying the screw 21, while the other end of the filament is connectedto one pole of a battery 25 by a wire 26 or other means, the other poleof the battery being connected to cap 12 and pulsator l7. lVhile thebattery 25 here shown may conveniently comprise dry cells arranged toend as customary in the art, it is to be understood that in the broadaspects of the invention the battery 25 exemplifies any suitable sourceof electric current or potential. The particular arrangement shown, is 7one very conveniently mounted in the shell or a flashlight or suitablereceptacle so as to be self-contained. In this respect it is convenientto construct the insulatory sleeve 10 and caps 11, 12 of substantiallythe same diameter of the batteries so the same can be inserted with thebatteries in a flashlight shell or other container as well as be clearfrom the specific embodiment of the invention illustrated in thedrawing.

The invention is applicable to many uses, amongst which may be mentionedthe use of the electric light to obtain a pulsation of some part of atoy, such as the eyes of a doll, or stuffed animals; or may be used togive illuminated twinkling response when an object is shaken, such as ananimated form, a target, and the like, or may be used in the arts todetect bridge instability, blasting effects and other structuralpulsations, or may be used to indicate human nervousness, motor andexplosion pulsation and many other applications unnecessary to enumeratewith greater particularity.

I claim:

An oscillating pulsator comprising a housing having an insulatoryportion circumferentially disposed and having a metallic portion carriedat one end of the insulatory portion for providing external electricalcontact and another contact at the other end of said housingelectrically separated from the first said metallic portion by the saidinsulatory portion, a screw projecting through said metallic andinsulat-ory portions radially thereof, and a vibratory memberlongitudinally positioned within the said housing supported by and inelectrical contact with the second mentioned contact and opposed to butnormally out of contact from said screw and adapted to vibrate intocontact with said screw whereby an electric circuit will beintermittently completed between said metallic portion and said contact.

SERGIUS APOSTOLOFF.

